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US 12,157,826 B2Granted
Ink formulations and associated writing instruments
AssigneeSanford, L.P.
InventorJiandong Zhu
Life of this patent
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Abstract
Ink formulations and associated writing instruments are disclosed herein. In some embodiments, an ink formulation is provided which includes an ink resin or polymer and a biobased solvent. In some embodiments, an ink formulation is provided which includes an ink resin or polymer and a solvent comprising at least one lactate ester.
Claims12
An ink formulation consisting of:
- an ink resin or polymer;
- a colorant present in an amount from about 3 percent to about 40 percent, by weight of the ink formulation;
- a biobased solvent present in an amount of about 35 percent to about 45 percent, by weight of the ink formulation;
- and
- a cap-off agent present in an amount of from about 0.1 percent to about 5 percent, by weight of the ink formulation;
- wherein the biobased solvent is consists of one or more lactate esters;
- and
- wherein the ink formulation is suitable for use with a writing instrument.
5 more elements
An ink formulation consisting of:
- an ink resin or polymer;
- a colorant;
- a solvent consisting of one or more lactate esters;
- and
- a cap-off agent;
- wherein the solvent is present in an amount of about 35 percent to about 95 percent, by weight of the ink formulation, and wherein the cap-off agent is present in an amount of from about 0.1 percent to about 2.5 percent, by weight of the ink formulation;
- and
- wherein the ink formulation is suitable for use with a writing instrument.
5 more elements
Dependencies are inferred from the claim text.